<template>
  <div class="upload-container">
    <el-upload
      :action="action"
      :headers="headers"
      :multiple="false"
      :limit="1"
      :before-upload="beforeUpload"
      :on-success="onSuccess"
      :on-error="onError"
      :on-remove="onRemove"
      :file-list="fileList"
      :on-exceed="onExceed"
      :disabled="disabled"
      drag
      show-file-list
      accept="application/epub+zip"
      class="image-upload"
    >
      <i class="el-icon-upload"></i>
      <div class="el-upload__text" v-if="fileList.length===0">
        请将电子书拖入或 <em>点击上传</em>
      </div>
      <div class="el-upload__text">图书已上传</div>
    </el-upload>
  </div>
</template>

<script>
  import {getToken} from '../../utils/auth';

  export default {
    props: {
      fileList: {
        type: Array,
        default() {
          return []
        }
      },
      disabled: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        action: `${process.env.VUE_APP_BASE_API}/book/upload`,
      }
    },
    computed: {
      headers() {
        return {
          Authorization: `Bearer ${getToken()}`
        }
      },
    },
    methods: {
      beforeUpload(file) {
        console.log(file)
        this.$emit('beforeUpload', file)
      },
      onError(err) {
        const errMsg = err.message && JSON.parse(err.message)
        console.log(errMsg.msg)
        this.$message({
          message: (errMsg && errMsg.msg && `上传失败，失败原因:${errMsg.msg}` || '上传失败'),
          type: 'error'
        })
        this.$emit('onError',err)

      },
      onSuccess(response,file) {
        // console.log(response,file)
        const {msg, code, data} = response
        if(code ===0){
          this.$message({
            message: msg,
            type: 'success'
          })
          this.$emit('onSuccess', data)
        }else {
          this.$message({
            message: (msg && `上传失败，失败原因：${msg}`) || '上传失败',
            type: 'error'
          })
        }
        this.$emit('onError',file)

      },
      onRemove() {
        this.$message({
          message: '电子书删除成功',
          type: 'success'
        })
        this.$emit('onRemove')

      },
      onExceed() {
        this.$message({
          message: '每次只能上传一本电子书',
          type: 'warning'
        })


      },
    },
  }
</script>

<style scoped>

</style>
